k-Permutations - ordering of elements

From your k-Permutations example:

This will print six 2-permutations of (1, 2, 3):

```
   [1, 2]
   [2, 1]
   [1, 3]
   [3, 1]
   [2, 3]
   [3, 2]
```

How can I make the "sort ascending by column"?

```
   [1, 2]
   [1, 3]
   [2, 1]
   [2, 3]
   [3, 1]
   [3, 2]
```